EP3168258B1 - Method for preparing polyolefin resin composition and polyolefin resin composition - Google Patents

Method for preparing polyolefin resin composition and polyolefin resin composition Download PDF

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EP3168258B1
EP3168258B1 EP15819303.7A EP15819303A EP3168258B1 EP 3168258 B1 EP3168258 B1 EP 3168258B1 EP 15819303 A EP15819303 A EP 15819303A EP 3168258 B1 EP3168258 B1 EP 3168258B1
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polyolefin resin
resin
aerogel
chip
glass
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German (de)
English (en)
French (fr)
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EP3168258A1 (en
EP3168258A4 (en
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Eun Hwa Jang
Young-Bum Kim
Seong-Min Cho
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Lotte Chemical Corp
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Lotte Chemical Corp
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/20—Compounding polymers with additives, e.g. colouring
    • C08J3/203—Solid polymers with solid and/or liquid additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/32—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof from compositions containing microballoons, e.g. syntactic foams
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/20—Compounding polymers with additives, e.g. colouring
    • C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
    • C08J5/0405—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres
    • C08J5/043—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres with glass fibres
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C08K3/36—Silica
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C08K7/04—Fibres or whiskers inorganic
    • C08K7/14—Glass
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/22—Expanded, porous or hollow particles
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/22—Expanded, porous or hollow particles
    • C08K7/24—Expanded, porous or hollow particles inorganic
    • C08K7/28—Glass
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/12—Polypropene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/10—Homopolymers or copolymers of propene
    • C08J2323/12—Polypropene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/10—Homopolymers or copolymers of propene
    • C08J2423/12—Polypropene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/002—Physical properties
    • C08K2201/006—Additives being defined by their surface area
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/10—Peculiar tacticity

Definitions

  • the present invention relates to a method for preparing a polyolefin resin composition, and a polyolefin resin composition, and more specifically to a method for preparing a polyolefin resin composition that can substantially maintain properties and characteristics of components and yet more uniformly mix them, that can provide a polyolefin resin composition having high mechanical properties and heat resistance even in a low specific gravity range and have uniform properties, and a polyolefin resin composition that can secure high mechanical properties and heat resistance even in a low specific gravity range and has uniform properties over an entire area thereof.
  • inorganic fillers such as glass fiber, talc, whiskers, glass bubbles, and the like have been extensively used as a rigid reinforcement.
  • Patent Document 1 Korean Registered Patent No. 1147386 discloses a resin composition including a polyolefin-based resin, inorganic fillers, glass bubbles, and ionomers functioning as a compatibilizer.
  • the polyolefin and glass bubbles are mixed using a twin screw [0018] extruder to prepare a polypropylene composite resin composition, however, when the polymer resin and glass bubbles are simply mixed and extruded, it may be difficult to maintain the shape of the glass bubbles and the effect of improving properties resulting from the use of glass bubbles may not be so significant.
  • Patent Document 2 discloses a method of using equipment performing a continuous process of an extruder and an injection machine in order to increase impregnability and compatibility between a polyolefin resin and inorganic fillers such as glass fiber, glass bubbles, and the like.
  • a polyolefin resin such as glass fiber, glass bubbles, and the like.
  • the shape of the glass fiber and glass bubbles may be changed in the extrusion and injection processes, and glass bubbles located inside the polymer resin may be pulverized to form pores at those parts, thus degrading the properties of the final product.
  • the aerogel is characterized by a structure consisting of entangled microfilaments with a thickness of about 1 ten thousandths of that of a hair and a porosity of 90 % or more, and the main material thereof is silicon oxide, carbon, or an organic polymer.
  • the aerogel is a very low density material having high light transmittance and very low thermal conductivity due to the above-explained structural characteristics.
  • the aerogel has very weak strength such as being easily broken by a small impact due to high brittleness and is difficult to process in various thicknesses and shapes, it had a limitation for application as an insulating material despite its excellent insulation property, and in case an aerogel and other reactants are mixed, a polymer resin may permeate inside the aerogel to increase the viscosity of the compound, making mixing impossible, and thus complexation or use in combination with other materials is difficult, and it cannot exhibit the properties of a porous aerogel.
  • the aerogel had problems in that it does not have high compatibility with a polymer resin or the shape is changed or destroyed in the process of mixing with a polymer resin, and thus various methods of mixing a polymer resin and an aerogel have been attempted.
  • a method for preparing a polyolefin resin composition including the step of mixing a first resin chip including a first polyolefin resin and glass filaments impregnated in the first polyolefin resin, and a second resin chip including a second polyolefin resin and an aerogel or glass bubbles impregnated in the second polyolefin resin, wherein a ratio of a length of the second resin chip to a length of the first resin chip is 0.8 to 1.2.
  • a polyolefin resin composition including a mixture of a first resin chip including a first polyolefin resin and glass filaments impregnated in the first polyolefin resin, and a second resin chip including a second polyolefin resin and an aerogel or glass bubbles impregnated in the second polyolefin resin, wherein micropores having a diameter of 1 to 50 ⁇ m are distributed in the second resin chip, and the polyolefin resin composition has a specific gravity of 0.75 to 1.00.
  • polyolefin resin molded article including an extrusion molded article of the polyolefin resin composition, and having a specific gravity of 0.75 to 1.05.
  • a method for preparing a polyolefin resin composition including the step of mixing a first resin chip including a first polyolefin resin and glass filaments impregnated in the first polyolefin resin, and a second resin chip including a second polyolefin resin and an aerogel or glass bubbles impregnated in the second polyolefin resin, wherein a ratio of a length of the second resin chip to a length of the first resin chip is 0.8 to 1.2.
  • the inventors conducted studies on a method for more easily and uniformly mixing a polyolefin resin, glass filaments, and an aerogel or glass bubbles, confirmed through experiments that if glass filaments and an aerogel or glass bubbles are respectively impregnated in a polyolefin resin, for example, prepared into a polymer resin chip, and mixed, glass filaments and an aerogel or glass bubbles may be more uniformly mixed while substantially maintaining the properties and the characteristics of the glass filaments and an aerogel or glass bubbles, and a finally prepared polyolefin resin composition may have high mechanical properties and heat resistance even in a low specific gravity range and uniform properties, and completed the invention.
  • first resin chip and the second resin chip For mixing of the first resin chip and the second resin chip, commonly known methods for mixing or blending polymer resin chips may be used.
  • the first resin chip may include 40 to 98 wt% of the first polyolefin resin, and 2 to 60 wt% of the glass filaments.
  • glass filaments having a length of 5 mm to 15 mm and a cross-sectional diameter of 1 to 50 ⁇ m may be used.
  • the second resin chip may include 40 to 98 wt% of the second polyolefin resin, and 2 to 60 wt% of the aerogel or glass bubbles.
  • the aerogel commonly known or commercially available products may be used without specific limitations, and for example, an aerogel having a longest diameter of 1 to 50 ⁇ m may be used. Further, the aerogel may have a specific surface area of 100 cm 2 /g to 1,000 cm 2 /g.
  • the glass bubble may be a hollow spherical glass particle having a longest diameter of 5 ⁇ m to 100 ⁇ m.
  • the glass bubble may have a specific gravity of 0.10 g/cc to 0.70 g/cc.
  • commonly known or commercially available products may be used without specific limitations, and for example, products from 3M Company may be used.
  • the first polyolefin resin and the second polyolefin resin may respectively include isotactic polypropylene having a melt index (measured at 230 °C according to ASTM D-1238) of 10 g/10 min to 40 g/10 min. If such isotactic polypropylene is used, contrary to the case wherein common polypropylene resin is used, the prepared polyolefin resin may have excellent properties such as high flowability and formability, and high mechanical properties and the like, and may secure high compatibility with other components.
  • the ratio of the length of the second resin chip to the length of the first resin chip may be 0.8 to 1.2, or 0.9 to 1.1.
  • the lengths of the first resin chip and the second resin chip are not specifically limited, and may be appropriately controlled considering the properties of the finally prepared polyolefin resin composition, and the like.
  • the first resin chip and the second resin chip may respectively have a length of 3 mm to 18 mm, or 4 mm to 15 mm.
  • the first resin chip and the second resin chip may respectively further include other additives, for example, inorganic fillers, emulsifiers, antioxidants, and the like.
  • the second resin chip may further include a coloring agent.
  • a coloring agent included in the second resin chip, excellent coloring performance may be exhibited when a molded article is manufactured, and an excellent molded article may be prepared without degradation of properties.
  • the method for preparing a polyolefin resin composition may further include a step of preparing the second resin chip including injecting an aerogel or glass bubbles inside an extruder into which the second polyolefin resin is injected through a side feeder connected to the extruder.
  • the aerogel or glass bubbles may be uniformly dispersed in the second polyolefin resin without a substantial change in the shape or properties of the aerogel or glass bubbles.
  • glass filaments and an aerogel or glass bubbles may be more uniformly mixed while substantially maintaining the properties and the characteristics of the glass filaments and aerogel or glass bubbles in the finally prepared resin composition.
  • the step of preparing the second resin chip may be conducted at a temperature of 200 °C to 280 °C. If the temperature of the step of preparing the second resin chip is too low, melting of the second polyolefin resin may not be easy. If the temperature of the step of preparing the second resin chip is too high, in the step of preparing the second resin chip, the shape of the aerogel or glass bubbles may be changed or destroyed, rendering the mixing and dispersion of the second polyolefin resin and aerogel or glass bubbles insufficient, and thus the specific gravity of the finally prepared resin composition may become high or the mechanical properties may not be sufficient.
  • a speed at which the second polyolefin resin is injected inside an extruder may be 80 RPM to 580 RPM.
  • the speed at which the second polyolefin resin is injected inside an extruder means a rotation speed of a feeder that injects the second polyolefin resin or equipment included therein such as a screw and the like. If the speed at which the second polyolefin resin is injected is too high, flowability of the prepared polyolefin resin may be lowered, thus degrading processibility such as generating problems in the preparation of a resin molded article. Further, if the speed at which the second polyolefin resin is injected is too low, the content of filament reinforcement may not be sufficient, thus degrading mechanical properties of the final product.
  • a speed at which an aerogel or glass bubbles are injected through the side feeder may be 80 RPM to 580 RPM.
  • the speed at which an aerogel or glass bubbles are injected through the side feeder means a rotation speed of a side feeder that injects the aerogel or equipment included therein such as a screw and the like.
  • the speed at which the aerogel or glass bubbles are injected through the side feeder is too high, mixing with the second polyolefin resin may not be easy, and the aerogel or glass bubbles may be aggregated in the finally prepared polyolefin resin composition, thus degrading the mechanical properties of the polyolefin resin composition. If the speed at which the aerogel or glass bubbles are injected through the side feeder is too low, it may be difficult for the polyolefin resin composition to secure sufficient mechanical properties, or it may be difficult to sufficiently lower the specific gravity.
  • the kind of shape of the extruder is not specifically limited, and extruders commonly known to be used for extrusion of a polymer resin, for example, a single screw extruder or a twin screw extruder, and the like, may be used.
  • the screw included in the extruder may rotate at a speed of 250 to 400 RPM. If the rotation speed of the screw of the extruder is too high, the shape of the aerogel or glass bubbles may be changed or destroyed, thus degrading the properties of the final product. If the rotation speed of the screw of the extruder is too low, the second polyolefin and the aerogel may not be uniformly mixed.
  • a polyolefin resin composition including a mixture of a first resin chip including a first polyolefin resin and glass filaments impregnated in the first polyolefin resin, and a second resin chip including a second polyolefin resin and an aerogel or glass bubbles impregnated in the second polyolefin resin, wherein micropores having a diameter of 1 to 50 ⁇ m are distributed in the second resin chip, and the polyolefin resin composition has a specific gravity of 0.75 to 1.00.
  • the glass filaments and the aerogel or glass bubbles are respectively impregnated in a polyolefin resin, for example, prepared in a polymer resin chip, and mixed, the glass filaments and aerogel or glass bubbles may be more uniformly mixed while substantially maintaining the properties and the characteristics of the glass filament and aerogel or glass bubbles, and the finally prepared polyolefin resin composition may have high mechanical properties and heat resistance even in a low specific gravity range and uniform properties.
  • the polyolefin resin composition may include a mixture or blended product of the first resin chip and the second resin chip.
  • the polyolefin resin composition may include a polymer resin composite wherein a first resin chip including a first polyolefin resin and glass filaments impregnated in the first polyolefin resin, and a second resin chip including a second polyolefin resin and an aerogel or glass bubbles impregnated in the second polyolefin resin, are extruded and mixed.
  • first resin chip and the second resin chip are respectively divided and mixed in the process of preparing the polyolefin resin composition, change or destruction of the shape of aerogel or glass bubbles included inside may be minimized.
  • micropores having a diameter of 1 to 50 ⁇ m may be distributed.
  • the micropores having a diameter of 1 to 50 ⁇ m may be micropores formed in the second resin chip due to the aerogel or glass bubbles.
  • the specific gravity may be relatively lowered, and particularly, it may have a specific gravity of 0.75 to 1.05, or 0.80 to 1.00.
  • the polyolefin resin composition includes glass filaments and the aerogel or glass bubbles in the first and second polyolefin resins, it may have high mechanical properties and heat resistance and the like, even in the above-explained specific gravity range.
  • the polyolefin resin composition or a resin molded article formed therefrom may have a tensile strength of 90 MPa or more, or 90 MPa to 150 MPa.
  • the polyolefin resin composition or a resin molded article formed therefrom may have a flexural modulus of 4,000 MPa or more, or 4,000 MPa to 6,000 MPa.
  • the polyolefin resin composition or a resin molded article formed therefrom may have a heat deflection temperature according to ASTM D648 of 135 °C, or 135 °C to 170 °C, or 145 °C to 160 °C.
  • the polyolefin resin composition may include 40 to 98 wt% of a polyolefin resin, 1 to 30 wt% of glass filaments, and 1 to 30 wt% of an aerogel or glass bubbles.
  • the first resin chip may include 40 to 98 wt% of the first polyolefin resin, and 2 to 60 wt% of the glass filaments.
  • the second resin chip may include 40 to 98 wt% of the second polyolefin resin, and 2 to 60 wt% of the aerogel or glass bubbles.
  • the first polyolefin resin and the second polyolefin resin may respectively include isotactic polypropylene having a melt index (measured at 230 °C according to ASTM D-1238) of 10 g/10 min to 40 g/10 min. If such isotactic polypropylene is used, contrary to the case wherein common polypropylene resin is used, the prepared polyolefin resin may have excellent properties such as high flowability and formability, and high mechanical properties and the like, and may secure high compatibility with other components.
  • the ratio of the length of the second resin chip to the length of the first resin chip may be 0.8 to 1.2, or 0.9 to 1.1.
  • the lengths of the first resin chip and the second resin chip are not specifically limited, and may be appropriately controlled considering the properties of the finally prepared polyolefin resin composition, and the like.
  • the first resin chip and the second resin chip may respectively have a length of 3 mm to 18 mm, or 4 mm to 15 mm.
  • the first resin chip and the second resin chip may respectively further include other additives, for example, inorganic fillers, emulsifiers, antioxidants, and the like.
  • a polyolefin resin molded article including an extrusion molded article of the polyolefin resin composition according to the above-explained embodiment, and having a specific gravity of 0.75 to 1.05.
  • the glass filaments and aerogel or glass bubbles may be more uniformly mixed while substantially maintaining the properties and the characteristics of the glass filament and aerogel or glass bubbles, and the finally prepared polyolefin resin composition may have high mechanical properties and heat resistance even in a low specific gravity range and uniform properties.
  • the polyolefin resin composition may include a mixture or blended product of the first resin chip and the second resin chip.
  • the polyolefin resin composition may include a polymer resin composite wherein a first resin chip including a first polyolefin resin and glass filaments impregnated in the first polyolefin resin, and a second resin chip including a second polyolefin resin and an aerogel or glass bubbles impregnated in the second polyolefin resin, are extruded and mixed.
  • first resin chip and the second resin chip For mixing the first resin chip and the second resin chip, commonly known methods for mixing polymer resin chips may be used.
  • the specific gravity may be relatively lowered, and particularly, it may have a specific gravity of 0.75 to 1.05, or 0.80 to 1.00. Further, as the polyolefin resin composition includes the glass filaments and aerogel in the first and second polyolefin resins, it may have high mechanical properties and heat resistance even in the above-explained specific gravity range.
  • a method for preparing a polyolefin resin composition that can substantially maintain the properties and the characteristics of the components and yet more uniformly mix them, and can provide a polyolefin resin composition having high mechanical properties and heat resistance even in a low specific gravity range and uniform properties, and a polyolefin resin composition that can secure high mechanical properties and heat resistance even at a low specific gravity area and has uniform properties over an entire area thereof.
  • FIG. 1 shows a photograph of a fracture plane of a second resin chip containing glass bubbles prepared in Example 1, taken with a scanning electron microscope.
  • Glass filaments (length of 7 mm, cross-sectional diameter of 20 ⁇ m) were impregnated in isotactic polypropylene having a melt index of 30 g/10 min (measured at 230 °C according to ASTM D-1238) at 240 °C using a twin screw extruder (screw diameter 40 mm) and an impregnation die, to prepare a first resin chip with a length of about 1 mm (glass filament content of 20 wt%).
  • the first resin chip and the second resin chip were mixed at a weight ratio of 1:1 to prepare a polymer resin blend composition.
  • the polymer resin blend composition was injected using an electric injection machine equipped with a screw only for filaments at 190 to 230 °C at an injection time of 8 to 10 s, to prepare an injection molded specimen.
  • a first resin chip, a second resin chip, a polymer resin blend composition, and an injection molded specimen were prepared by the same method as Example 1, except that the content of glass bubbles included in the second resin chip was changed to about 20 wt%.
  • a first resin chip, a second resin chip, a polymer resin blend composition, and an injection molded specimen were prepared by the same method as Example 1, except that porous silica aerogel (specific surface area about 500 cm 2 /g) was used instead of the glass bubbles included in the second resin chip.
  • glass bubbles were introduced into isotactic polypropylene having a melt index of 30 g/10 min (measured at 230 °C according to ASTM D-1238) and extrusion was conducted, glass filaments (length of 7 mm, cross-sectional diameter of 20 ⁇ m) were impregnated therein, followed by pelletizing to prepare a polymer resin chip (glass fiber content: about 10 wt%, aerogel content about 5 wt%).
  • Tensile strengths of the extrusion molded specimen of the polymer resin blend composition obtained in the examples and the resin chip of the comparative example were measured using a universal testing machine according to the standard of ASTM D638.
  • Flexural modulus of the extrusion molded specimen of the polymer resin blend composition obtained in the examples and the resin chip of the comparative example were measured using a universal testing machine according to the standard of ASTM D790.
  • Heat deflection temperatures of the extrusion molded specimen of the polymer resin blend composition obtained in the examples and the resin chip of the comparative example were measured according to the standard of ASTM D648.
  • the components may be more uniformly mixed while substantially maintaining the properties and the characteristics of the components, and a polyolefin resin composition having high mechanical properties and heat resistance even in a low specific gravity range and uniform properties and a resin molded article using the same may be provided.
  • FIG. 1 the photograph of the fracture plane of the second resin chip containing glass bubbles prepared in Example 1, taken with a scanning electron microscope, is shown. As shown in FIG. 1 , it is confirmed that in the polypropylene resin base of the second resin chip, micropores having a diameter of 1 to 50 ⁇ m are uniformly dispersed.

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EP15819303.7A 2014-07-07 2015-07-06 Method for preparing polyolefin resin composition and polyolefin resin composition Active EP3168258B1 (en)

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KR1020140084615A KR101627308B1 (ko) 2014-07-07 2014-07-07 폴리올레핀 수지 조성물의 제조 방법 및 폴리올레핀 수지 조성물
PCT/KR2015/006953 WO2016006895A1 (ko) 2014-07-07 2015-07-06 폴리올레핀 수지 조성물의 제조 방법 및 폴리을레핀 수지 조성물

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CN113429597B (zh) * 2021-07-22 2022-08-09 福建师范大学泉港石化研究院 一种高浸渍度长玻纤增强聚丙烯复合材料及其制备方法

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US5973015A (en) 1998-02-02 1999-10-26 The Regents Of The University Of California Flexible aerogel composite for mechanical stability and process of fabrication
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Publication number Publication date
US9938391B2 (en) 2018-04-10
KR20160005547A (ko) 2016-01-15
HUE050781T2 (hu) 2021-01-28
EP3168258A1 (en) 2017-05-17
US20170121486A1 (en) 2017-05-04
CN106103550A (zh) 2016-11-09
WO2016006895A1 (ko) 2016-01-14
CN106103550B (zh) 2019-04-02
EP3168258A4 (en) 2018-01-24
KR101627308B1 (ko) 2016-06-03

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